Commentary explaining the meaning of the ayahs. One passage often covers several ayahs, so neighbouring ayahs can show the same text.
Tafseer Al Saadi - Arabic tafsir for Surah Sad — Ayah 81
إِلَىٰ يَوۡمِ ٱلۡوَقۡتِ ٱلۡمَعۡلُومِ ٨١
} إِلَى يَوْمِ الْوَقْتِ الْمَعْلُومِ } حين تستكمل الذرية، يتم الامتحان.